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Fix bug in 3-byte and 4-byte toScalars

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Richard Feldman 2022-07-02 15:25:33 -04:00
parent 077c37d9fb
commit cfb33cb414
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1 changed files with 4 additions and 4 deletions
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8
crates/compiler/builtins/bitcode/src/str.zig
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@ -523,8 +523,8 @@ fn strToScalars(string: RocStr) callconv(.C) RocList {
} else if (utf8_byte >> 4 == 0b0000_1110) {
// Its four high order bits are 1110, so this is a three-byte sequence.
// Discard the first byte's high order bits of 110.
var code_pt = @intCast(u32, utf8_byte & 0b0001_1111);
// Discard the first byte's high order bits of 1110.
var code_pt = @intCast(u32, utf8_byte & 0b0000_1111);
// Discard the second byte's high order bits of 10.
code_pt <<= 6;
@ -539,8 +539,8 @@ fn strToScalars(string: RocStr) callconv(.C) RocList {
} else {
// This must be a four-byte sequence, so the five high order bits should be 11110.
// Discard the first byte's high order bits of 110.
var code_pt = @intCast(u32, utf8_byte & 0b0001_1111);
// Discard the first byte's high order bits of 11110.
var code_pt = @intCast(u32, utf8_byte & 0b0000_0111);
// Discard the second byte's high order bits of 10.
code_pt <<= 6;